shill: Add shill's init scripts to shill package

All shill specific init scripts will be installed by shill in
platform2's ebuild instead of being installed by chromeos-init

BUG=chromium:346443
TEST=trybot on amd64-generic-paladin, x86-alex-paladin, daisy_spring-paladin, duck-release
CQ-DEPEND=CL:187487, CL:187523

Change-Id: I2767749464aeb2222b064bbe64c7f269ed3d9906
Reviewed-on: https://chromium-review.googlesource.com/187496
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Bertrand Simonnet <bsimonnet@chromium.org>
Commit-Queue: Bertrand Simonnet <bsimonnet@chromium.org>
diff --git a/init/shill_respawn.conf b/init/shill_respawn.conf
new file mode 100644
index 0000000..186edce
--- /dev/null
+++ b/init/shill_respawn.conf
@@ -0,0 +1,16 @@
+# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+description   "Restart shill at slow rate if it fails to respawn"
+author        "chromium-os-dev@chromium.org"
+
+# If shill fails to start up due to fast-respawn, this is a bad
+# thing.  Connectivity in chromium-os is absolutely essential, so
+# respond to this failure by pausing and restarting.
+start on stopped shill PROCESS=respawn
+
+script
+  sleep 60
+  start shill
+end script